Textfield should not have hover effects if it is disabled or readonly

[callmeberzerker]

This PR disables all :hover effects if the field is either disabled or readonly.

[forceofseth]

This would help our project. We are using the Textfield in readonly + disabled mode to display data.

[vikignt]

I think for disabled it is enough to specify pointer-events: none; in the global styles of the application, it is in the note in the readme file.
With readonly the question is not unambiguous, this component can be used as an activator of some popup component, for example it is used in Datefield, the calendar opens when readonly and focus is received.
What do you think about this?

[callmeberzerker]

Thanks for the reply @vikignt

I think for disabled we can safely remove it then. And for the readonly you make a valid use-case but not sure what's the best way to solve it then. I think in general it's helpful to have a readonly presentable form (without the greyed out disabled effects) to read the label/value distinctly. Do you have any suggestion how to solve this? (I will augment this PR)

[sourcegr]

https://developer.mozilla.org/en-US/docs/Web/HTML/Attributes/readonly